GB545941A - Manufacture of polymeric materials - Google Patents
Manufacture of polymeric materialsInfo
- Publication number
- GB545941A GB545941A GB17819/40A GB1781940A GB545941A GB 545941 A GB545941 A GB 545941A GB 17819/40 A GB17819/40 A GB 17819/40A GB 1781940 A GB1781940 A GB 1781940A GB 545941 A GB545941 A GB 545941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol
- formaldehyde
- specified
- polyamide
- employed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/48—Polymers modified by chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
545,941. Polyamides ; phenol-aldehyde resins. DU PONT DE NEMOURS & CO., E. I. Dec. 18, 1940, No. 17819. Convention date, Dec. 18, 1939. [Class 2 (iii)] Modified polyamides suitable for use in moulding or coating compositions or for drawing into fibres are obtained by heating polyamideforming reactants with phenol until a non- fibre-forming polyamide is obtained and then continuing the heating in presence of formaldehyde or formaldehyde liberating substance. Alternatively, a low molecular weight polyamide may be heated with a phenol and formaldehyde. The phenols employed must be free -from amide-forming groups ; phenol, o-cresol, p-cresol, p-tert. butyl phenol and ptert. amyl phenol being specified. Formaldehyde liberating substances specified are paraform, trioxymethylene, methylal and hexa. Polyamide forming reactants as specified in Specifications 461,236 and 461,237 and U.S.A. Specifications 2,071,250 and 2,130,948 may be employed. The first stage is carried out at temperatures of 180-290‹ C. in a vessel flushed with oxygen-free nitrogen, and the second stage at temperatures of 180-225‹ C. The products may be hardened by the usual catalysts employed in hardening phenol-formaldehyde resins.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US545941XA | 1939-12-18 | 1939-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB545941A true GB545941A (en) | 1942-06-19 |
Family
ID=21992171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17819/40A Expired GB545941A (en) | 1939-12-18 | 1940-12-18 | Manufacture of polymeric materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB545941A (en) |
-
1940
- 1940-12-18 GB GB17819/40A patent/GB545941A/en not_active Expired
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